[DeTomaso] Gaskets and flanges needed

[Will Demelo]

After spending $2k on headers and having to modify them extensively, the vendor fails to reply to my request for collector gaskets and flanges. I need to make new tailpipes for my 180's.
I can't seem to find them around here and I can't find them online.
They are 3" ID with 3 bolts. The bolts measure 3.8" center to center and 4.25" outside. The gasket manufactures advertise "bolt circle" which is outside to outside.
Can anyone help me with a link?
Thanks, Will